Physiology of Vasodilation

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Questions and Answers

What is the underlying mechanism of nerve conduction block due to hyperstimulation?

  • Blocking of nodes of Ranvier
  • Increased nerve conduction velocity
  • Slow Na channels (correct)
  • Fast Na channels

What theory explains the decrease in pain sensation through cutaneous thermoreceptors?

  • Nerve conduction block theory
  • Muscle strength theory
  • Metabolic rate theory
  • Gate control theory (correct)

What is a contraindication for superficial heat therapy in patients with demyelinating conditions?

  • Muscle spasm
  • Cutaneous thermoreceptors
  • Chronic wound
  • Multiple sclerosis (correct)

What is the effect of heat therapy on muscle strength during the initial 30 minutes?

<p>Decrease in muscle strength (A)</p> Signup and view all the answers

What is the effect of heat therapy on enzymatic activity in the range of 39°C to 43°C?

<p>Increase in enzymatic activity (C)</p> Signup and view all the answers

What is the primary mechanism by which heat is transferred through conduction?

<p>The direct contact between a warm surface and a cooler surface (C)</p> Signup and view all the answers

What is the effect of heat therapy on the healing of articular cartilage in patients with rheumatoid arthritis?

<p>Accelerate destruction (A)</p> Signup and view all the answers

Which of the following is an example of a heat transfer method that does not require direct contact?

<p>Radiation through an infrared lamp (D)</p> Signup and view all the answers

What is the primary factor that affects the rate of heat transfer through conduction?

<p>The surface area of contact between the two surfaces (D)</p> Signup and view all the answers

Which of the following heat transfer methods involves the conversion of nonthermal energy into heat?

<p>Conversion of ultrasound energy into heat (A)</p> Signup and view all the answers

What is the primary mechanism by which topical analgesics provide heat to the muscles?

<p>Conversion of chemical energy into heat (D)</p> Signup and view all the answers

What is the primary advantage of using heat therapy to increase blood flow during healing?

<p>It increases muscle strength (B)</p> Signup and view all the answers

What is a crucial factor to consider when applying heat therapy to increase circulation?

<p>Client's individuality (A)</p> Signup and view all the answers

What is the primary mechanism by which heat therapy increases muscle strength?

<p>Decreased neuromuscular inhibition (C)</p> Signup and view all the answers

Which of the following is a metabolic effect of heat therapy?

<p>Decreased cardiovascular workload (C)</p> Signup and view all the answers

What is the primary reason for avoiding heat therapy in patients with cardiac risk factors?

<p>Increased cardiac workload (A)</p> Signup and view all the answers

According to the gate control theory, what is the mechanism by which heat therapy relieves pain?

<p>Inhibition of pain transmission (B)</p> Signup and view all the answers

What is a contraindication for superficial heat therapy?

<p>Malignant tissue (D)</p> Signup and view all the answers

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